;; Hey, Emacs: -*- Indent-tabs-mode: nil -*-

;; This config requires Emacs 27.
;; With some differences in package.el initialization it should work with Emacs 24.4(+?).
;; Without (advice-add) it should work in older versions of Emacs 24.

;;;; Use XDG-ish locations ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(let ((xdg-cache-home (file-name-as-directory (or (getenv "XDG_CACHE_HOME") "~/.cache")))
      (xdg-data-home  (file-name-as-directory (or (getenv "XDG_DATA_HOME") "~/.local/share"))))
  (setq
   wl-init-file                 (concat user-emacs-directory "wl.el")
   eshell-directory-name        (concat xdg-data-home "emacs/eshell/") ;; actually should be split between config and data
   ido-save-directory-list-file (concat xdg-data-home "emacs/ido.last.el")

   package-user-dir             (concat xdg-cache-home "emacs/elpa")
   el-get-dir                   (concat xdg-cache-home "emacs/el-get/")
   wl-score-files-directory     (concat xdg-cache-home "emacs/wl-score-files/")
   elmo-msgdb-directory         (concat xdg-cache-home "emacs/elmo-msgdb/")
   elmo-cache-directory         (concat xdg-cache-home "emacs/elmo-cache/")
   auto-save-list-file-prefix   (concat xdg-cache-home "emacs/auto-save-list/saves-")
   tramp-persistency-file-name  (concat xdg-cache-home "emacs/tramp-cache.el")
   ))

(setq custom-file (concat user-emacs-directory "custom.el"))
(load custom-file 'noerror)

;;;; The basics that I can't use Emacs without ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(show-paren-mode 1)
(column-number-mode 1)
(line-number-mode 1)
(ido-mode 1)
(unless (daemonp) (server-mode 1))
(when (require 'whitespace)
  (setq whitespace-style '(
        tab-mark
        space-mark
        newline-mark
        empty
        ))
  (global-set-key "\C-cw" 'global-whitespace-mode))
(setq minibuffer-prompt-properties '(
      read-only t
      point-entered minibuffer-avoid-prompt
      face minibuffer-prompt
      ))


;;;; Early settings ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; This isn't particularly important, but set it before doing a whole
;; lot (loading packages), so there isn't a weird change in text size.
(set-face-attribute 'default nil
                    :family "DejaVu Sans Mono"
                    :height 80
                    ;:weight 'semi-bold
                    )
(when (fboundp 'tool-bar-mode) (tool-bar-mode -1))
(when (fboundp 'scroll-bar-mode) (scroll-bar-mode -1))
(setq inhibit-startup-screen t)


;;;; Package management ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; package.el
(when (require 'package)
  ;; Don't clutter custom.el with `package-selected-packages`; I want
  ;; to exclusively use use-package for this.
  (defun package--save-selected-packages--nocustom (&optional value)
    "Set `package-selected-packages' to VALUE."
    (when value
      (setq package-selected-packages value)))
  (advice-add 'package--save-selected-packages
              :override #'package--save-selected-packages--nocustom)
  ;; Add Melpa repos.
  (add-to-list 'package-archives
               '("melpa-stable" . "https://stable.melpa.org/packages/") t)
  (add-to-list 'package-archives
               '("melpa" . "http://melpa.org/packages/") t)
  ;; Always prefer versions from GNU > Melpa-Stable > Melpa, even if the
  ;; later have higher version numbers.
  (setq package-archive-priorities
        '(("gnu"          . 99)
          ("melpa-stable" .  5)
          ("melpa"        .  0)))
  ;; Finally, initialize the package manager.  Pass the `t` argument
  ;; to cause it to not go ahead and load all downloaded packages; and
  ;; wait for (use-package) to request them.
  (package-initialize t))

;; use-package.el
(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))
(package-activate 'use-package)
(eval-when-compile
  (require 'use-package)
  ;; Have (use-package) calls eagerly install things.
  (setq use-package-always-ensure t)
  ;; Patch (use-package-ensure-elpa) to call (package-activate
  ;; package) if the package is already installed, which is needed to
  ;; make it work with the the `t` argument in
  ;; `(package-initialize t)`.
  ;;
  ;; Apparently back in 2015 hacking (use-package-ensure-lazyelpa)
  ;; wasn't necessary (https://emacs.stackexchange.com/a/16852), and
  ;; I'm not sure what changed.
  (defun use-package-ensure-lazyelpa (name args _state &optional _no-refresh)
    (dolist (ensure args)
      (let ((package
             (or (and (eq ensure t) (use-package-as-symbol name))
                 ensure)))
        (when package
          (require 'package)
          (when (consp package)
            (use-package-pin-package (car package) (cdr package))
            (setq package (car package)))
          (if (package-installed-p package)
              (package-activate package)
            (condition-case-unless-debug err
                (progn
                  (when (assoc package (bound-and-true-p
                                        package-pinned-packages))
                    (package-read-all-archive-contents))
                  (unless (assoc package package-archive-contents)
                    (package-refresh-contents)
                    (when (assoc package (bound-and-true-p
                                          package-pinned-packages))
                      (package-read-all-archive-contents))
                    (package-install package))
                  (package-install package)
                  t)
              (error
               (display-warning 'use-package
                                (format "Failed to install %s: %s"
                                        name (error-message-string err))
                                :error))))))))
  (setq use-package-ensure-function 'use-package-ensure-lazyelpa))
;; Load bind-key so that (use-package :bind) works.
(require 'bind-key)

;; Themes ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package modus-themes
  :config (progn
            ;; Modus makes MMM regions almost impossible to see
            (add-hook 'modus-themes-after-load-theme-hook
                      (lambda ()
                        (modus-themes-with-colors
                          (custom-set-faces
                           `(mmm-cleanup-submode-face     ((,class :background ,yellow-refine-bg)))
                           `(mmm-code-submode-face        ((,class :background ,bg-active)))
                           `(mmm-comment-submode-face     ((,class :background ,blue-refine-bg)))
                           `(mmm-declaration-submode-face ((,class :background ,cyan-refine-bg)))
                           `(mmm-default-submode-face     ((,class :background ,bg-alt)))
                           `(mmm-init-submode-face        ((,class :background ,magenta-refine-bg)))
                           `(mmm-output-submode-face      ((,class :background ,red-refine-bg)))
                           `(mmm-special-submode-face     ((,class :background ,green-refine-bg)))))
                        ))
            ;; Load the theme.  Use this function instead of
            ;; load-theme in order to get the above hook.
            (modus-themes-load-vivendi)
            ))

;; Minor modes ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package editorconfig
  :config (progn
            (editorconfig-mode 1)
            (add-to-list 'editorconfig-indentation-alist '(protobuf-mode c-basic-offset))
            (add-to-list 'editorconfig-indentation-alist '(terraform-mode terra-indent-level
                                                                          terraform-indent-level
                                                                          hcl-indent-level))
            ))
;; (use-package eglot)
(use-package jq-format
  :commands (jq-format-json-buffer
             jq-format-json-region
             jq-format-json-on-save-mode
             jq-format-jsonlines-buffer
             jq-format-jsonlines-region
             jq-format-jsonlines-on-save-mode))
;; (use-package company)
;; (use-package flycheck)
;; (use-package yasnippet)
;; (use-package lsp-mode :commands lsp)
;; (use-package lsp-ui :commands lsp-ui-mode)
(use-package multiple-cursors
  :bind (("C-c m l" . mc/edit-lines)
         ("C-c m n" . mc/insert-numbers)))
(use-package outline-magic
  :commands (outline-cycle
             outline-next-line
             outline-move-subtree-up
             outline-move-subtree-down
             outline-promote
             outline-demote))
(use-package page-break-lines ;; Display form-feeds pretty
  :init (advice-add 'page-break-lines-mode-maybe
                    :override #'page-break-lines-mode)
  :config (global-page-break-lines-mode 1))
(use-package smart-tabs-mode ;; Indent with tabs, align with spaces
  :config (progn
            (smart-tabs-mode 1)
            (apply 'smart-tabs-insinuate
                   (mapcar 'car smart-tabs-insinuate-alist))))

;; Major modes (non-HTML-related) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package bats-mode         :mode "\\.bats\\'")
(use-package bazel
  :mode (((rx "/" (or "BUILD" "BUILD.bazel") eos)         . bazel-build-mode)
         ((rx "/" (or "WORKSPACE" "WORKSPACE.bazel") eos) . bazel-workspace-mode)
         ((rx "/" (+ nonl) ".bzl" eos)                    . bazel-starlark-mode)
         ((rx "/" (or "bazel.bazelrc" ".bazelrc") eos)    . bazelrc-mode)
         ((rx "/.bazelignore" eos)                        . bazelignore-mode)))
(use-package bison-mode
  :mode (("\\.l\\'" . bison-mode)
         ("\\.y\\'" . bison-mode)
         ("\\.jison\\'" . jison-mode)))
(use-package cmake-mode        :mode ("CMakeLists\\.txt\\'" "\\.cmake\\'"))
(use-package dockerfile-mode
  :mode "Dockerfile\\(?:\\..*\\)?\\'"
  :commands (dockerfile-build-buffer
             dockerfile-build-no-cache-buffer))
(use-package erc
  :config (add-hook 'erc-mode-hook
                    (lambda ()
                      (define-key erc-mode-map (kbd "C-c C-u") 'erc-cmd-QUERY)
                      )))
(use-package glsl-mode         :mode ("\\.vert\\'" "\\.frag\\'" "\\.geom\\'" "\\.glsl\\'"))
(use-package go-mode
  :mode ("\\.go\\'" "go\\.mod")
  :config (progn
            (when (fboundp 'eglot-ensure)
              (add-hook 'go-mode-hook
                (lambda ()
                  (set (make-local-variable 'eglot-workspace-configuration)
                       '(:gopls (:codelenses (:generate nil
                                              :gc_details t)
                                 :annotations (:bounds t
                                               :escape t
                                               :inline t
                                               :nil t))))
                  (eglot-ensure))))
            (when (fboundp 'lsp)
              (add-hook 'go-mode-hook 'lsp-deferred))))
(use-package graphql-mode      :mode ("\\.graphql\\'" "\\.gql\\'"))
(use-package graphviz-dot-mode
  :mode ("\\.dot\\'" "\\.gv\\'")
  :config (add-hook 'graphviz-dot-mode-hook
                    (lambda ()
                      (set (make-local-variable 'graphviz-dot-auto-indent-on-semi) nil)
                      )))
(use-package jq-mode
  :mode "\\.jq\\'"
  :interpreter "jq")
(use-package js
  :interpreter (("node" . js-mode)
                ("nodejs" . js-mode)
                ("gjs" . js-mode)
                ("rhino" . js-mode))
  :config (add-hook 'js-mode-hook
                    (lambda ()
                      (hs-minor-mode t)
                      (local-set-key [C-tab] 'hs-toggle-hiding)
                      )))
(use-package lua-mode
  :mode "\\.lua\\'"
  :interpreter "lua")
(use-package markdown-mode     :mode ("\\.markdown\\'" "\\.md\\'" "\\.ronn\\'"))
(use-package meson-mode        :mode "/meson\\(\\.build\\|_options\\.txt\\)\\'")
(use-package nginx-mode        :mode ("nginx\\.conf\\'" "/nginx/.+\\.conf\\'"))
(use-package protobuf-mode     :mode "\\.proto\\'")
(use-package python
  :mode ("\\.py[iw]?\\'" . python-mode)
  :interpreter ("python[0-9.]*" . python-mode)
  :config (add-hook 'python-mode-hook
                    (lambda ()
                      (hs-minor-mode t)
                      (local-set-key [C-tab] 'hs-toggle-hiding)
                      )))
(use-package ruby-mode
  :mode "\\(?:\\.\\(?:rbw?\\|ru\\|rake\\|thor\\|jbuilder\\|rabl\\|gemspec\\|podspec\\)\\|/\\(?:Gem\\|Rake\\|Cap\\|Thor\\|Puppet\\|Berks\\|Brew\\|Vagrant\\|Guard\\|Pod\\)file\\)\\'"
  :interpreter ("ruby" "rbx" "jruby" "ruby1.9" "ruby1.8")
  :config (add-hook 'ruby-mode-hook
                    (lambda ()
                      (set (make-local-variable 'indent-tabs-mode) t)
                      (set (make-local-variable 'ruby-indent-level) 4)
                      (set (make-local-variable 'tab-width) 4)
                      )))
(use-package terraform-mode    :mode "\\.tf\\(vars\\)?\\'")
(use-package yaml-mode
  :mode "\\.\\(e?ya?\\|ra\\)ml\\'"
  :config (add-hook 'yaml-mode-hook
                    (lambda ()
                      (outline-minor-mode t)
                      (set (make-local-variable 'outline-regexp) "[ \t]*[A-Za-z-]")
                      )))

;; Major modes (HTML-related) ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-package coffee-mode
  :mode ("\\.coffee\\'"
         "\\.iced\\'"
         "\\Cakefile\\'"
         "\\.cson\\'")
  :interpreter "coffee"
  :config (add-hook 'coffee-mode-hook
                    (lambda ()
                      (set (make-local-variable 'tab-width) 2)
                      (set (make-local-variable 'indent-tabs-mode) nil)
                      )))
(use-package haml-mode         :mode "\\.haml\\'")
(use-package less-css-mode     :mode "\\.less\\'")
(use-package php-mode
  :mode ("\\.php[s345t]?\\'" "/\\.php_cs\\(\\.dist\\)?\\'" "\\.phtml\\'" "/Amkfile\\'" "\\.amk\\'")
  :interpreter "php\\(?:-?[3457]\\(?:\\.[0-9]+\\)*\\)?")
(use-package scss-mode         :mode "\\.scss\\'")
(use-package typescript-mode   :mode "\\.tsx?\\'")
(use-package web-mode
  :mode ("\\.html\\'"
         "\\.vue\\'")
  :config (add-hook 'web-mode-hook
                    (lambda ()
                      (setq web-mode-enable-auto-closing nil)
                      (setq web-mode-enable-auto-pairing nil)
                      (setq web-mode-enable-auto-opening nil)
                      (setq web-mode-enable-auto-quoting nil)
                      (setq web-mode-enable-auto-expanding nil)
                      (setq web-mode-enable-auto-indentation nil)
                      )))
(use-package mmm-mode
  :load mmm-auto
  :config (progn
            ;; Define the class
            (mmm-add-classes
             '((js-graphql
                :submode graphql-mode
                :face mmm-code-submode-face
                :front "[^a-zA-Z]graphql`"
                :back "`")))
            ;; Add too mmm-mode-ext-classes-alist
            (mmm-add-mode-ext-class 'js-mode nil 'js-graphql)
            (setq
             ;; Enable MMM for modes/files named in
             ;; mmm-mode-ext-classes-alist, and only modes/files named
             ;; in mmm-mode-ext-classes-alist.
             mmm-global-mode 'maybe
             ;; 0 = none, 1 = low, 2 = high
             mmm-submode-decoration-level 2)
            ))

;; Email ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(if (file-exists-p "~/Maildir")
    (use-package wanderlust
      :commands (wl)
      :config (progn
                (define-mail-user-agent
                  'wl-user-agent
                  'wl-user-agent-compose
                  'wl-draft-send
                  'wl-draft-kill
                  'mail-send-hook)
                (setq mail-user-agent 'wl-user-agent)
                ;; Use mailcrypt to encrypt/decrypt email
                (when (require 'mailcrypt nil t)
                  (mc-setversion "gpg")
                  (add-hook 'wl-summary-mode-hook 'mc-install-read-mode)
                  (add-hook 'wl-mail-setup-hook 'mc-install-write-mode)
                  (defun mc-wl-verify-signature ()
                    (interactive)
                    (save-window-excursion
                      (wl-summary-jump-to-current-message)
                      (mc-verify)))
                  (defun mc-wl-decrypt-message ()
                    (interactive)
                    (save-window-excursion
                      (wl-summary-jump-to-current-message)
                      (let ((inhibit-read-only t))
                        (mc-decrypt))))
                  (eval-after-load "mailcrypt"
                    '(setq mc-modes-alist
                           (append
                            (quote
                             ((wl-draft-mode (encrypt . mc-encrypt-message)
                                             (sign . mc-sign-message))
                              (wl-summary-mode (decrypt . mc-wl-decrypt-message)
                                               (verify . mc-wl-verify-signature))))
                            mc-modes-alist))))
                )))


;; Non-built-in modes that aren't available with (use-package) ;;;;;;;;;;;;;;;;;

(eval-when-compile
  (add-to-list 'load-path (concat user-emacs-directory "go-template-mode"))
  (require 'go-template-mode))

;; http://www.emacswiki.org/emacs/XModMapMode
(when (not (fboundp 'xmodmap-mode))
  (define-generic-mode 'xmodmap-mode
    '(?!)
    '("add" "clear" "keycode" "keysym" "pointer" "remove")
    nil
    '("[xX]modmap\\(rc\\)?\\'")
    nil
    "Simple mode for xmodmap files."))


;; Config for built-in modes that are not exposed as ELPA :core packages ;;;;;;;

(add-hook 'text-mode-hook 'turn-on-auto-fill)

(add-hook 'lisp-mode-hook
          (lambda ()
            (set (make-local-variable 'indent-tabs-mode) nil)
            ))

(add-hook 'emacs-lisp-mode-hook
          (lambda ()
            (set (make-local-variable 'indent-tabs-mode) nil)
            ))

(eval-after-load "term"
  '(progn
     ;; Better buffer names ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
     ;;
     ;; Ideally, figuring this out should be done by uniquify, but I
     ;; haven't determined how to get uniquify to think that it manages the
     ;; term buffer.
     (defun term-get-short-cwd ()
       ;; local base=$PWD
       ;; local suffix=''
       ;; # The regex here is a list of directory names
       ;; # that aren't really helpful, and that the
       ;; # parent directory should be included also.
       ;; if [[ $base =~ (/(src|pkg|doc|pkg-libre|src-libre|trunk|tags|branches))*$ ]]; then
       ;;         suffix=$BASH_REMATCH
       ;;         base=${base%$suffix}
       ;; fi
       ;; base=${base##*/}
       ;; echo ${base}${suffix}
       (directory-file-name default-directory))
     (defun term-handle-ansi-terminal-messages--uniquify (args)
       (rename-buffer (concat
                       (replace-regexp-in-string "<.*>$" "" (buffer-name))
                       "<"
                       (term-get-short-cwd)
                       ">")
                      t))
     (advice-add 'term-handle-ansi-terminal-messages :after
                 #'term-handle-ansi-terminal-messages--uniquify)
     ;; Mode settings ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
     (add-hook 'term-mode-hook
               (lambda ()
                 (auto-fill-mode -1)
                 (setq term-prompt-regexp "^[^#$%>\n]*[#$%>] *")
                 (set (make-local-variable 'mouse-yank-at-point) t)
                 (setq tab-width 8 )
                 (setq truncate-lines nil)
                 (set (make-local-variable 'autopair-dont-activate) t) ;; Don't let autopair break ansi-term
                 ))))


(add-hook 'tex-mode-hook
          (lambda ()
            (set (make-local-variable 'tab-always-indent) nil)
            (set (make-local-variable 'indent-tabs-mode) t)

            ))

(eval-after-load "sh-script"
  '(progn
     ;; Fix indentation ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
     (defun sh-smie-sh-rules--fix (args)
       "Replace :after \"then\" with :after \"if\" because Emacs 24
sh-script.el is broken."
       (if (equal args (list :after "then"))
           (list :after "if")
         args))
     (advice-add 'sh-smie-sh-rules :filter-args
                 #'sh-smie-sh-rules--fix)
     ;; Mode settings ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
     (add-hook 'sh-mode-hook
               (lambda ()
                 (sh-electric-here-document-mode 0)
                 ))))

(add-hook 'outline-minor-mode-hook
          (lambda ()
            (define-key outline-minor-mode-map [C-tab] 'outline-cycle)))

(add-to-list 'auto-mode-alist '("PKGBUILD" . sh-mode))
(add-to-list 'auto-mode-alist '("SRCBUILD" . sh-mode))
(add-to-list 'auto-mode-alist '("\\.mak\\'" . makefile-gmake-mode))
(add-to-list 'auto-mode-alist '("\\.jad\\'" . java-mode))
(add-to-list 'auto-mode-alist '("\\.schema\\'" . js-mode))


;; Misc. crap ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(setq-default truncate-lines t)

(defun align-regexp--use-spaces (orig-fun &rest args)
  "Use spaces for alignment"
  (let ((indent-tabs-mode nil))
    (apply orig-fun args)))
(advice-add 'align-regexp :around
           #'align-regexp--use-spaces)

;; Make the mouse work in an xterm
(when (fboundp 'xterm-mouse-mode)
  (xterm-mouse-mode 1)
  (add-hook 'after-make-frame-functions
            (lambda (frame)
              (if xterm-mouse-mode (xterm-mouse-mode 1))
              )))

;; Make TRAMP obey ~/.ssh/config for ControlMaster.  For some reason,
;; customize doesn't correctly set this.
(setq tramp-use-ssh-controlmaster-options nil)

;; Indent settings
(setq-default
 indent-tabs-mode t
 tab-width 8
 c-basic-offset 8
 sh-basic-offset 8
 sh-indent-comment t
 )

;; Backup settings
(setq
 backup-by-copying      t ;; don't clobber symlinks
 backup-directory-alist '(("." . "~/.cache/emacs/saves")) ;; don't litter my fs tree
 delete-old-versions    t
 kept-new-versions      6
 kept-old-versions      2
 version-control        t ;; use versioned backups

 create-lockfiles       nil ;; don't litter my fs tree
 )

;; Web browser settings
(setq
 browse-url-generic-program (executable-find "v-www-browser")
 browse-url-browser-function 'browse-url-generic
 )

;; Ediff settings
(setq
 ediff-window-setup-function 'ediff-setup-windows-plain
 ediff-split-window-function 'split-window-horizontally
 )

;; Automatically load smerge mode for merge files
(defun try-smerge-mode ()
  (save-excursion
    (goto-char (point-min))
    (when (re-search-forward "^<<<<<<< " nil t)
      (smerge-mode 1))))
(add-hook 'find-file-hook 'try-smerge-mode t)

;; Interactive commands
(defun hex2dec-region (beg end)
  "Convert the region from hexadecimal to decimal."
  (interactive "r")
  (let ((hex-str (buffer-substring beg end)))
    (delete-region beg end)
    (insert (number-to-string (string-to-number hex-str 16)))))


;; Anything that gets magically appended ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(put 'upcase-region 'disabled nil)
(put 'downcase-region 'disabled nil)